Lock



Aug. 3, 1937.

N. B. HURD LOCK Filed May 26, 1936 my: TOR MRMAA/ III/R0 ATTORNEYJ Patented Aug. 3, 1937 LOCK Norman B. I Hurd, Newington,

The American Hardware Conn., assignor to Corporation, New

. Britain, Conn., a corporation of Connecticut Application May 26, 1936, Serial No. 81,803

6 Claims; 01. 70-150) This invention relates to certain new and useful mprovements in door locks for hotel bedrooms, ofiices or other special instances, such as staterooms or ofiicers quarters on vessels.

Theobject of this invention is to improve door locks of the' spring'latch-bolt type in which no separate dead boltiis required, since the latch retracting mechanism itself may be dogged whenever it -is desired to prevent the door from being opened from the outside excepting by the use of a suitable'key. The improvements are also such that, if the latch-bolt retracting mechanism has been dogged, it may be undogged from the indoor side':=by'merely turning the inside doorknob (or equivalentrpreparatory to retracting the latch. Another object is to simplify the construction and assembly of the parts necessary to accomplish the desired ends. Other objects will appear to a mechanic skilled in this art from a reading of the followingdescription and an examination of the accompanying drawing, in which I have shown'my lockin only one preferred form and in which Fig. 1 is a side fcap=remo'ved;

:Fig. '2 a similar view with the parts shown g-ualdifl'erent position from that indicated in Fig. 3is an end elevation of the look as it will appear in place on the door, said view being relatively reduced in size. Before describing in detail the construction, it may be stated' that the lock shown is of the spring latch-bolt type and is equipped with an inside knob, or' equivalent manually operable means for-retracting the bolt, and it may also be provided with an inside thumb turn, or equivalent means, foridogging the latch against retraction from the outside excepting by means of a suitable :key-t'o first throw oil the dog. The construction is also such that when the bolt has been (logged byeither means, the dog may be thrown off by a' preliminary turn of either the outside key;or the inside knob, after which a further turn ofeither :operates to retract the bolt.

Now, as to the construction shown in the drawing; I-represents alock case having the usual removable cap (not shown) to afford access to the interior mechanism. 2 represents the usual facei plate, 3a latch-bolt, 4a latch-bolt tail, 5 a springior-normallyprojecting the bolt, and 6 a shoe at:the'rear of the latch-bolt tail 4. I is a bolt retracting lever, pivoted at 1', at or near thebottom of the case I. The upper end of this lever is designed to engage the shoe 6 to retract; the bolt-. 8.- :is' a roll-back having a single arm 8'. 9 is an indoor knob, or equivalent device, connected by the usual spindle to the rollback 8. The lever 1 has a laterally projecting portion 1" engaging one side of the arm 8' so elevation of v the lock with the that, when the roll-back 8 is rotated in a counter-clockwise direction, itwill swing back the lever I and retract the bolt. I0 is a bell crank, pivoted at- I0, near the bottom of the case. II is a. link between one end of the bell crank to the bolt retracting lever I. The other arm of the bell crank bears against that side of'the rollback arm'B opposite tothe lever extension 1. Hence, rotation in' either direction of the rollback hub will-retract the bolt. It will be observed th'atby the arrangement shownthe com- Ponentoff orces' is such that substantially the same leverage isapplied by either turning movement in transmitting pbwerfrom the roll-back 8 to the tail 4 for the purpose of retracting the bolt. It-will also be noted that a shorter retracting' lever may be used'than required for a twoarm r'oll-back, and hencea smaller and more compact case may be employed. I2 is a spring which' functions" to urge the bell crankand the lever 1 against opposite sides of the roll-back 8' to establish its normal idle position and to also normally" hold theupper end ofthe lever I spaced -s'lightly' away from the shoe 6, as shown in Fig. 1, and for the purpose later' described. 2 E

Thus far I have described a mechanism by which thelatc'h may be retracted by means of a knob actuated single arm roll-back.

" Now, turning tothe'means'for dogging'the bolt from the outside or'inside and for undogging and retracting the-bolteither by' an outside key or an inside"kn'ob',-I3 represents a' bolt dogging hub mounted in the case. I3" represents an indoor thumb turn,'or equivalent device, for thesaid hub. I is a back stop for the dogging hub." On one side of this hub are'two spaced talons I4-I4. I5 is a key-controlled roll-back arm,.preferably of the cylinder type, and by means of Which the dogging hub I3' may be shifted to its on or off position. On the opposite side of hub I3 is a dogging shoulder or arm I6 and also an undoggingor' reversingshoul'der orarm I1. I6 is a nose formed on oneside'of arm I6 against which nose 9. spring I6 bears to hold the dogging hub in its "on or off position. The bolt shoe 6 is of novel construction and comprises a forward extension I8: This'extension has an upwardly inclined shoulder which forms 'a dogging abutmerit against which the dogging arm' I6 engages when the bolt is doggedas shown in Fig. 1. In this position, the bolt'cann'ot be undogged or retracted from the outdoor side, excepting by means of a proper key, and'hence no separate dead-bolt is required. By using a key and tuming the arm I5 in a counter-clockwise direction, 1 as-viewed 'inFig. 1,;it ;wil1,-:pass the end of a second latch retracting lever I9 and engage the talon I l and swing the hub I3 in a direction to undog the bolt. This rotation of the hub I3 will cause nose I6 of the dogging arm I6 to shift the lever I 9 swing-the hub to the onpositionindicated'in' an incline I9" against which'the-ta1on--Il'- bears when the bolt is dogged,'whereby"the upper end' of the lever l9 will be held out of" the range of rotation of the arm I5. Whenever-thedogging hub I 3 has been swung to the on or dogging position shown in Fig. l, the occupant of the roommaystill freely openthe-doonby simply-turningthe knob 9, since the first partof-saidmovement will undog the bolt, thisbeing accomplished by:

means of an extension 1" on--the upper end of the lever 'l which overlaps an-undoggingarm I1. There is provided a sufiicient degree of 10st motion between the lever 1- and theshoerfi, so that the formerwill not engage the-latter to retract,

thebolt until the latter-has-been fullyundogged;

whereupon a continued rotation of the roll-back 8 by the knob 9 will cause thebolttobe retracted.

When the hubl3 standsin an ofi position-as shown in Fig, 2' and itJSgdBSiIGdtO dog: the bolt by usingan outside key, the arm I 5 may be turned ina clockwise direction to engage talon l4" and Fig. 1. On this movementthetalon-I4 engages incline- I9 and cams the lever IQ-intothe extreme ofi position shown in said'figure so that the end of the arm IB'maytreeIy pass said lever when turned in counter-clockwise direction to undog the bolt by roll back l5.

I-use theword knob herein in a general sense to include any well-known equivalent means for 4 actuating the roll-back.

I claim:

1. In a door lock, a case alatch-bolt, adapted to be retracted by anfinsi'de controlled-roll-back and a latch-bolt retracting lever, a bolt dogging 5 hub having a dogging armland a' -reversin'g arm intermediate at one side withtwo spaced 'talons'at'the opposite side, a key rotatable arm coacting with: said talons to shift said hub to on and oil positions, a key'actuated bolt retracting'lever pivoted its length: and; positioned to be rocked bysaid key rotatable-arm to retract said bolt whenthe dogging hub is off and'positioned to be out of range of said key rotatable arm:when said dogging hub. is'on said: key rotatable arm being operable by a key at the outdoor side of said lock, said latch-bolt retracting lever coacting with said reversing arm torundog, said bolt when said' lever'is retracted to retract-said bolt.

2. In a door lock; a case, a latch-bolt, adapted to be operated by a main bolt retracting lever and a roll-back operable by a knob-fromithe-indoor side of the lock to swing saidlever toretract the bolt, a bolt dogging hub adapted to be operated by means at the inside of the door and having a bolt dogging arm and a reversing arm at one side with two spaced talons at the opposite side, a key rotatable arm coacting with said talons to shift said hub to on and off positions, a key actuated bolt retracting lever pivoted intermediate its length and positioned to be rocked by said key rotatable arm to retract and retract the" IQ intermediate said bolt when the dogging hub is off and positioned to be out of range of said key rotatable arm when said dogging hub is on, said key rotatable arm being operable by, a key at the outdoor side of said lock, and means at the indoor side of said lock for operating said dogging hub independently of said indoor knob.

3. In a door look, a case, a latch-bolt adapted to be operated by a main bolt retracting lever and' a roll-back operable by a knob from the indoor sideof the lock to swing said lever to retract the bolt; a bolt dogging hub having a dogging. arm and a reversing arm at one side with two spaced talons at the opposite side, a

key rotatable arm coacting with said talons to shift said hub to on andoil positions, azkey actuated bolt retracting lever pivoted: interme= diate its length andpositioned to be-rocked'zby. said key rotatable armto retract said bolt .when: the dogging hub isoff and positioned to be out of range of. said keyrotatable arm when :saidi dogging hub is on, saidrtkeyi rotatable'izarmx being operable by a keyatthe: outdoor-:slderof said lock, and a connection between: theraknob actuated roll-back and thereversing arm on the dogging hub to move saidhubto theEoflf position upon the first turning movement of said' roll-back preliminary toretractingisaid'bolt, and to. thereafter retract said latch" whena saidcdo'gtging hub is inits ofi position byra further 'turn ingl movement of said rollrback. in thexsame direction. 1.1.

4. In a door lock, a case, a latch-boltpniearis positively operable from the indoor: and:-'oi.it-- door sides of the lock'for-pos'itively dogging; the bolt against retraction from the. outside, excepting? by means of a key, and independentlyzoper able means at the indoor side for both undogging and retracting said bolt.

5. In a door look, a case, a latchebolt;;a"bolt dogging hub to' positively hold'said boltyprojected' when said hub is in-its'rfon position and to free said bolt for retraction when in its .ofl"f position, means to shift said hub' to it's."ofi

position: and then retract the bolt by an indoor knob, means at the outdoor sideqto; positively shift said dogging hub to each: of said positions, said means being operable by a key; from: the out-s side: of. said door for also retracting: said bolt.

6. Ina door look, a. case,..a latch-bolt adapted to be retracted'by an inside controlled roll-back and a main latch-bolt retracting lever, a:'bolt dogging hub having a. dogging; arm and-a reversing arm at one side with two'spaced talons at the opposite side; a key rotatable arm coacting with said talons to shift said hub" to on and oil positions, a key actuated bolt retracting lever pivoted intermediate its length and positioned to be rocked by said: key rotatable arm to retract said bolt: when. the dogging'hub is off and positioned. to be out of range of said key rotatable arm when saidv dogging hub is on, said key rotatablev arm being operable by a key at the outdoor side of said lock, and

a connection-between said main latch-boltmetracting lever and said reversing arm to move said dogging hub from the on tothe off position upon the first turning movement of said inside controlled roll-back preliminary toretra'cting said bolt thereby.

1 NORMAN. B. 'HURD. 

